From WhitixDoc

In Whitix, the system calls are the services provided by the kernel; it is essentially a kernel API. In general, these system functions are wrapped by C functions in the librtl library, but it is possible to use system calls directly.

Contents 1 Call method 2 List 2.1 Filesystem 2.2 Memory 2.3 Task management 2.4 Time 2.5 Network 2.6 Miscellaenous

Call method

Unlike in Linux, parameters are passed through the stack rather than registers. However, for a system call to succeed, several registers must contain certain values:

Register	Value
eax	System call index. See the list
ecx	Number of bytes in argument stack
edx	Address of argument stack.

With the argument stack laid out in the typical C way (last argument pushed first and so on), an int $0x30 is then issued. After the system call returns (if it does), a return value is placed in eax.

List

There is a list of system calls in kernel/sys.c and user/librtl/sysdefs.h. This is a complete list, with links to the description of each system function.

Filesystem

eax	Name	Source	First arg.	Second arg.	Third arg.	Fourth arg.
0	SysOpen	fs/vfs/file.c	char*	int	int	-
1	SysCreateDir	fs/vfs/dir.c	char*	int	-	-
2	SysClose	fs/vfs/file.c	int	-	-	-
3	SysRemove	fs/vfs/file.c	char*	-	-	-
4	SysRemoveDir	fs/vfs/dir.c	char*	-	-	-
5	SysFileAccess	fs/vfs/file.c	char*	int	-	-
6	SysFileDup	fs/vfs/file.c	int	-	-	-
7	SysFileSync	fs/vfs/file.c	int	-	-	-
8	SysFileSystemSync	fs/vfs/vcache.c	-	-	-	-
9	SysTruncate	fs/vfs/file.c	int	size_t	-	-
10	SysMove	fs/vfs/file.c	char*	char*	-	-
11	SysWrite	fs/vfs/file.c	int	char*	size_t	-
12	SysRead	fs/vfs/file.c	int	char*	size_t	-
13	SysSeek	fs/vfs/file.c	int	size_t	int	-
14	SysChangeDir	fs/vfs/dir.c	char*	-	-	-
15	SysChangeRoot	fs/vfs/dir.c	char*	-	-	-
16	SysMount	fs/vfs/super.c	char*	char*	char*	void*
17	SysUnmount	fs/vfs/super.c	char*	-	-	-
18	SysGetDirEntries	fs/vfs/dir.c	int	void*	size_t	-
19	SysGetCurrDir	fs/vfs/dir.c	char*	size_t	-	-
20	SysStat	fs/vfs/file.c	char*	struct Stat*	-	-
21	SysStatFd	fs/vfs/file.c	int	struct Stat*	-	-
22	SysIoCtl	fs/vfs/file.c	int	unsigned long	void*	-
23	SysPoll	fs/vfs/poll.c	void*	unsigned long	int	-
24	SysPipe	fs/vfs/pipe.c	int*	-	-	-

Memory

Task management

Time

eax	Name	Source	First arg.
41	SysGetTime	arch/i386/kernel/time.c	struct Time*

Network

eax	Name	Source	First arg.	Second arg.	Third arg.	Fourth arg.
42	SysSocketCreate	net/socket.c	int	int	int	-
43	SysSocketBind	net/socket.c	int	void*	int	-
44	SysSocketConnect	net/socket.c	int	void*	int	-

This short article needs expansion or improvement. Why not help?

Miscellaenous

eax	Name	Source	First arg.
51	SysShutdown	kernel/reboot.c	int
52	SysIoAccess	arch/i386/kernel/ioperms.c	int